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Messing with some of my carburetor's for my 77, k5. The one on the left is a holley 1850 with a rear metering block conversion, the one on the right is a quick fuel off road 600 with the rear metering block conversion as well, (this 600 is no longer made). Right now I have a brawler, 650 double pumper on my blazer and it seems to pull the hardest. I am trying to fine tune these carb's for the best mileage vs. power so I keep changing things, (ifr's, pvcr's, air bleeds, jets, etc..) I am trying to hit 15 mpg or so with good power. The 650 brawler, (not in pic) is pretty trick, side hung, spring loaded floats, single feed, and everything inside is changeable and it's a double pumper. I am still at it to find the best of the three, It's fun messing with them and learning a lot along the way.
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